Ktp Crystal, Wide Transmittance, Low Dielectric Constant

Min.Order: 25
Product origin: Jiaozuo, Henan, China
Infringement complaint: complaintComplaint
US$ 1 ~ 100

Description
Non-linear Optical Crystals (NLO Crystals) have extended the laser spectrum from deep UV to far IR by various harmonic generations (like SHG, THG, 4HG, 5HG), sum frequency generations, difference frequency generations, optical parametric oscillators, etc.

Product Description:
Potassium Titanium Oxide Phosphate (KTiOPO4 ), or KTP, is an efficient nonlinear optical crystal in the visible to infrared spectral region with relatively low cost. It has large nonlinear coefficient. The effective nonlinear optical coefficient of KTP deff at 1064nm is more than 1.5 times that of BBO. It's damage threshold is near 1 GW/cm2 for 1 Hz 10 ns pulses at 1064nm.

Application:
KTP crystal is a kind of popular nonlinear optical crystal with excellent nonlinear optical properties. As a frequency conversion optical material, KTP crystal had been widely used in scientific research and technique and many other fields, especial best for small and medium-sized power frequency doubling. Frequency doubler and photoparametric amplifier produced by KTP crystal had been had been applied in solid-state tunable laser light source. he properties of KTP make it superior as an electro-optic modulator as well as an optical waveguide device, including phase modulators, amplitude modulators and directional couplers.

Main Specification:
Main Specifications 
Dimension 1x1x0.05 - 30x30x40 mm
Phase matching typeType II, θ=90°; φ=phase-matching angle
Typical Coatinga) S1&S2: AR @1064nm R<0.1%; AR @ 532nm, R<0.25%.

b) S1: HR @1064nm, R>99.8%; HT @808nm, T>5%
S2: AR @1064nm, R<0.1%; AR @532nm, R<0.25%

Customized coating available upon customer request.
Angle tolerance6'
Δθ< ± 0.5°; Δφ< ±0.5°
Dimension tolerance±0.02 - 0.1 mm
(W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) for NKC series
Flatnessλ/8 @ 633nm
Scratch/Dig code10/5 Scratch/dig per MIL-O-13830A
Parallelism<10'
better than 10 arc seconds for NKC series
Perpendicularity5'
5 arc minutes for NKC series
Wavefront distortionless than λ/8 @ 633nm
Clear aperture 90% central area
Working temperature25°C - 80°C
Homogeneitydn ~10-6/cm 
Physical and Chemical Properties
Crystal structureOrthorhombic
Point groupmm2
Melting point1172°C incongruent
Lattice parametersa=6.404Å, b=10.615Å, c=12.814Å, Z=8
Temperature of decomposition~1150°C
Transmition temperature936°C
Mohs hardness~5
Density2.945 g/cm3
Colorcolorless
Hygroscopic susceptibilityno
Specific heat0.1737 cal/g.°C
Thermal conductivity0.13 W/cm/°C
Electrical conductivity3.5x10-8 s/cm (c-axis, 22°C, 1KHz)
Thermal expansion coefficientsa1 = 11 x 10-6 °C-1
a2 = 9 x 10-6 °C-1
a= 0.6 x 10-6 °C-1
Thermal conductivity coefficientsk1 = 2.0 x 10-2 W/cm °C
k2 = 3.0 x 10-2 W/cm °C
k3 = 3.3 x 10-2 W/cm °C
Dielectric constanteeff = 13
Optical Properties 
Transmitting range350nm ~ 4500nm
Refractive indices nxnynz
1064nm1.74001.74691.8304
532nm1.77871.79241.8873
Absorption coefficientsa < 1%/cm @1064nm and 532nm
Therm-optic coefficientsdnx/dT=1.1x10-5/°C
dny/dT=1.3x10-5/°C
dnz/dT=1.6x10-5/°C
Electro-optic coefficients
 Low frequency (pm/V)High frequency 
(pm/V)
r139.58.8
r2315.713.8
r3336.335.0
r517.36.9
r429.38.8
Sellmeier equationsnx2=2.10468 + 0.89342λ2/(λ2-0.04438)-0.01036λ2 
ny2=2.14559 + 0.87629λ2/(λ2-0.0485)-0.01173λ2 
nz2=1.9446 + 1.3617λ2/(λ2-0.047)-0.01491λ2
Nonlinear Properties 
Phase matching range497nm - 3300 nm
Nonlinear coefficients
 (@ 10-64nm)
d31=2.54pm/V, d31=4.35pm/V, d31=16.9pm/V
d24=3.64pm/V, d15=1.91pm/V at 1.064 mm
Effective nonlinear optical coefficientsdeff(II)≈ (d24 - d15)sin2qsin2j - (d15sin2j + d24cos2j)sinq
Type II SHG of 1064nm Laser
Phase matching angleq=90°f=23.2° 
Effective nonlinear optical coefficientsdeff »8.3 x d36(KDP) 
Angular acceptanceDθ= 75 mrad  Dφ= 18 mrad
Temperature acceptance25°C.cm 
Spectral acceptance5.6 Åcm
Walk-off angle1 mrad
Optical damage threshold1.5-2.0MW/cm2

Advantage:

Efficient frequency conversion(1064nm SHG conversion efficiency is about 80%)
 
Large nonlinear optical coefficients(15 times that of KDP)
 
Wide angular bandwidth and small walk-off angle
 
Broad temperature and spectral bandwidth
 
High thermal conductivity (2 times that of BNN crystal )
 
Moisture free
 
Minimum mismatch gradient
 
Super-polished optical surface
 
No decomposition below 900°C
Mechanically stable 
 
Low cost compare with BBO and LBO




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